/*
 * Copyright 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.transition

import android.animation.Animator
import android.animation.ValueAnimator
import android.view.ViewGroup

/** A test transition that always provides an animation, regardless of start/end state */
class AlwaysTransition(private val keyPrefix: String) : Transition() {
    override fun captureStartValues(transitionValues: TransitionValues) {
        transitionValues.values[keyPrefix + Key] = AlwaysChangingValue++
    }

    override fun captureEndValues(transitionValues: TransitionValues) {
        transitionValues.values[keyPrefix + Key] = AlwaysChangingValue++
    }

    override fun isSeekingSupported(): Boolean = true

    override fun createAnimator(
        sceneRoot: ViewGroup,
        startValues: TransitionValues?,
        endValues: TransitionValues?
    ): Animator = ValueAnimator.ofFloat(0f, 100f)

    companion object {
        private const val Key = "alwaysChanging"
        private var AlwaysChangingValue = 0
    }
}
